WO2015125170A1 - Dispositif de détection de position désignée - Google Patents

Dispositif de détection de position désignée Download PDF

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Publication number
WO2015125170A1
WO2015125170A1 PCT/JP2014/000817 JP2014000817W WO2015125170A1 WO 2015125170 A1 WO2015125170 A1 WO 2015125170A1 JP 2014000817 W JP2014000817 W JP 2014000817W WO 2015125170 A1 WO2015125170 A1 WO 2015125170A1
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Prior art keywords
coordinate
coil
loop
loop coil
designated
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PCT/JP2014/000817
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English (en)
Japanese (ja)
Inventor
康史 関沢
研二 田原
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ニューコムテクノ株式会社
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Application filed by ニューコムテクノ株式会社 filed Critical ニューコムテクノ株式会社
Priority to CN201480003364.3A priority Critical patent/CN105051655A/zh
Priority to KR1020147030781A priority patent/KR101498870B1/ko
Priority to JP2014543647A priority patent/JP5661980B1/ja
Priority to US14/432,718 priority patent/US20160349915A1/en
Priority to PCT/JP2014/000817 priority patent/WO2015125170A1/fr
Priority to TW104105679A priority patent/TW201601028A/zh
Publication of WO2015125170A1 publication Critical patent/WO2015125170A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/046—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by electromagnetic means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04186—Touch location disambiguation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • G06F3/04886—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures by partitioning the display area of the touch-screen or the surface of the digitising tablet into independently controllable areas, e.g. virtual keyboards or menus

Definitions

  • the present invention relates to a designated position detection device, and is suitable for an information processing device having a tablet display surface, for example.
  • An information processing apparatus having a tablet display surface is frequently used as a means that allows a user to easily execute processing of information corresponding to a designated display position by designating a specific display position on the tablet display surface. .
  • an information processing apparatus having a tablet display surface it is possible to improve the practicality of the information processing apparatus by detecting the designated position on the display surface of the user so that the detection accuracy as high as possible can be maintained with the simplest possible configuration. It is effective as a means.
  • the present invention has been made in consideration of the above points.
  • the detection signal obtained from the loop coil disposed in the edge region is subjected to an interpolation calculation process, which is high. It is an object of the present invention to propose a designated position detection device that can obtain a position detection signal with high accuracy.
  • the electromagnetic coupling type position specifying tool 5 is placed on the coordinate position specifying surface 3 on which a plurality of loop coils X1 to XN and Y1 to YM constituting the XY coordinate system are arranged.
  • the position is designated by the specified coordinate detection output from the loop coils X1 to XN and Y1 to YM that are electromagnetically coupled to the position designation tool 5 among the loop coils X1 to XN and Y1 to YM at the designated position.
  • a designated position detection device 4 to be obtained which is adjacent to the first position detection output value V4 obtained from the first loop coil J4 in the edge region surrounding the inner region and the inside of the first loop coil J4.
  • the first loop coil 3 Based on the second position detection output value V3 obtained from the second loop coil J3 in the inner region and the first coil pitch K02 between the first and second loop coils, the first loop coil 3 so as to detect the specified position coordinate by the position specifying device 5 by interpolation calculation coordinate shift value to the vertex coordinates p in the specified coordinate detection output W0 from.
  • the detection output of the first loop coil in the edge region and the second loop coil in the adjacent inner region is detected by the coil pitch between the first and second loop coils, so that the designated position by the position designation tool It is possible to realize a designated position detection device that can expand coordinates to the edge region with high accuracy.
  • FIG. 2 is a schematic connection diagram illustrating details of a designated position detection unit in FIG. 1. It is a signal waveform diagram showing a specified position detection operation.
  • A) And (B) is a basic diagram which shows the arrangement
  • (A) And (B) is a signal waveform diagram which shows the assumed waveform of the detection output obtained from an inner side area
  • reference numeral 1 denotes an information processing device as a whole, and the central processing unit 2 exchanges information with the tablet display plate unit 3, whereby the tablet display plate unit 3.
  • the designated position detection signal S1 representing the designated position is designated as the designated position.
  • the information is output from the detection control unit 6 to the central processing unit 2, and the central processing unit 2 executes processing of the corresponding information.
  • the tablet display board part 3 has an X-axis loop coil board part 11 and a Y-axis loop coil board part 12 which are arranged so that the entire display surface overlaps, and the Y-axis loop coil board part 12 is controlled to be designated position detection.
  • the drive signal input unit 13 controlled by the unit 6 signal input control in the Y-axis direction on the tablet display board unit 3 is performed.
  • position detection control in the X-axis direction is performed using the detection signal output unit 14 in which the X-axis loop coil plate unit 11 is controlled by the designated position detection control unit 6.
  • the X-axis loop coil plate unit 11 includes a plurality of N (for example, 32) X-axis loop coils X1 in the X-axis direction (lateral direction in FIG. 2). , X2... XN are sequentially arranged so as to be parallel to each other while extending vertically in the vertical direction.
  • Each of the X-axis loop coils X1, X2,... XN has a configuration in which a linear conductive wire is wound once so as to have a vertically long rectangular shape, whereby the X-axis loop coil X1, X2... XN center positions in the X-axis direction can specify N coordinate positions at equal intervals in the X-axis direction on the XY display surface.
  • the X-axis loop coils X1, X2,... XN are shifted in the lateral width direction and partially overlap with each other in the X-axis direction (for example, as shown in FIG. 4).
  • the four loop coils J1 to J4 are positioned in an overlapping relationship), and the position detection signals obtained from the overlapping loop coils are interpolated in the X-axis direction to detect the specified position. It is designed to increase accuracy.
  • a plurality of M (for example, 20) Y-axis loop coils Y1, Y2,... YM in the vertical direction in FIG. However, they are sequentially arranged so as to be parallel to each other.
  • Each of the Y-axis loop coils Y1, Y2,... YM has a configuration in which a linear conductive wire is wound once so as to form a vertically long rectangular shape in the horizontal direction, whereby the Y-axis loop coil Y1.
  • Y2... YM center positions in the Y-axis direction can specify M coordinate positions at equal intervals in the Y-axis direction on the XY display surface.
  • the Y-axis loop coils Y1, Y2,... YM are shifted in the lateral width direction and partially overlap with each other in the Y-axis direction (for example, as described above with reference to FIG. 4).
  • the four loop coils J1 to J4 are positioned in an overlapping relationship), and the position detection signal obtained from the overlapped loop coils is interpolated in the Y-axis direction to obtain the specified position. The detection accuracy is improved.
  • the X-axis loop coil plate portion 11 and the Y-axis loop coil plate portion 12 are overlapped with each other with an insulating material layer interposed therebetween, so that the X-axis loop coils X1, X2,.
  • the coils Y1, Y2,... YM are positioned so as to be orthogonal to each other in a grid pattern.
  • the coordinates of the designated position are arranged in the X-axis loop coils X1, X2,. It can be determined based on the position, and can be specified by the arrangement position of the Y-axis loop coils Y1, Y2,... YM in the Y-axis direction.
  • One end of the Y-axis loop coils Y1, Y2,... YM of the Y-axis loop coil plate part 12 is connected to the ground via drive input switches 21Y1, 21Y2... 21YM provided in the drive signal input part 13.
  • These drive input switches 21Y1, 21Y2... 21YM are respectively sent at the timings shown in FIGS. 3 (B1), (B2)... (BM) by sequential switching signals S2Y1, S2Y2. ON / OFF controlled.
  • position detection operation periods TY1, TY2,... TYM having a predetermined length are sequentially assigned to the Y-axis loop coils Y1, Y2,.
  • the first half section is set as the drive input periods TY11, TY21... TYM1, and the switching signals S2Y1, S2Y2.
  • Drive pulse signals S4Y1, S4Y2,... S4YM (FIG. 3 (C1), (C2)... (CM)) are supplied to Y-axis loop coils Y1, Y2,.
  • each of the Y-axis loop coils Y1, Y2,... YM is connected to a power supply terminal that receives a power supply VDD from the designated position detection control unit 6 through a pulse drive switch 22 provided in the drive signal input unit 13.
  • the pulse drive switch 22 is ON / OFF controlled at a predetermined pulse period by a pulse control signal S3 supplied from the designated position detection control unit 6, and as a result, as shown in FIGS. 3 (B1), (B2)... (BM).
  • a pulse control signal S3 supplied from the designated position detection control unit 6, and as a result, as shown in FIGS. 3 (B1), (B2)... (BM).
  • the drive input switches 21Y1, 21Y2... 21YM are turned on by the drive input signals S2Y1, S2Y2,... S2YM
  • the drive pulse signal S4Y1 is generated at the timing shown in FIGS.
  • S4Y2... S4YM are sequentially supplied to the Y-axis loop coils Y1, Y2... YM via the common connection line P1.
  • the common connection line P1 between the pulse drive switch 22 and the Y-axis loop coils Y1, Y2,... YM is connected to the ground through the input-side resonance capacitor 25, whereby the drive pulse signals S4Y1, S4Y2,.
  • the Y-axis loop coils Y 1, Y 2... YM together with the input-side resonance capacitor 25 form a parallel resonance circuit.
  • the resonance frequency of the parallel resonance circuit formed by the Y-axis loop coils Y1, Y2,... YM and the input-side resonance capacitor 25 is selected as the on / off frequency of the power supply VDD supplied through the pulse drive switch 22,
  • a large current can flow, and as a result, a position detection operation period TY1, TY2,..., A drive input period TY11 in the first half of TYM, In TY12... TYM2, a strong drive magnetic field can be generated from the Y-axis loop coils Y1, Y2.
  • each of the X-axis loop coils X1, X2,... XN of the X-axis loop coil plate portion 11 is further passed through position detection output switches 33X1, 33X2,.
  • the other end of the X-axis loop coils X1, X2,... XN is connected in common to each other through the common connection line 34L2 and connected to the non-inverting input terminal of the output differential amplifier circuit 32 through the common connection line 34L1.
  • the output differential amplifier circuit 32 is connected to the inverting input terminal.
  • the sequential detection signals S5X1, S5X2,... S5XN supplied from the designated position detection control unit 6 are given to the position detection output switches 33X1, 33X2,... 33XN, as shown in (D1), (D2),.
  • the position detection output switches 33X1, 33X2,... 33XN are respectively input between the non-inverting input terminal and the inverting input terminal of the output differential amplifier circuit 32.
  • an output-side resonance capacitor 31 is connected between the common connection lines 34L1 and 34L2 at one end and the other end of the X-axis loop coils X1, X2.
  • the X-axis loop coils X1, X2... XN and the output-side resonance capacitor 31 sequentially form a parallel resonance circuit.
  • the inductive resonance voltage generated at both ends of the output differential amplifying circuit 32 is provided as a position detection output to the non-inverting input terminal and the inverting input terminal.
  • the position specifying tool 5 is constituted by a resonance loop including a tuning coil 41 and a tuning capacitor 42, and as described above with reference to FIG. 3, the position detection operation period TY1 provided for the Y-axis loop coils Y1, Y2,. , TY2... TYM, a magnetic field is generated by applying drive inputs S2Y1, S2Y2... S2YM in the drive input periods TY11, TY21.
  • a tuning resonance current that tunes to the magnetic field flows through the tuning coil 41 and the tuning capacitor 42, thereby storing tuning resonance energy.
  • the tuning frequency of the tuning coil 41 and the tuning capacitor 42 is selected to be a value that matches the resonance frequency of the resonance current of the Y-axis loop coils Y1, Y2,.
  • the resonance energy of the resonance current of the coils Y1, Y2,... YM can be efficiently stored in the tuning resonance loop.
  • the tuning coil 41 and the tuning capacitor 42 are supplied with a tuning resonance current having a resonance frequency determined by the tuning coil 41 and the tuning capacitor 42 in the detection output periods TY12, TY22 following the drive input periods TY11, TY21... TYM1. ... Continues flowing in TYM2 to induce induced electromotive force based on the tuning resonance current in the X-axis loop coils X1, X2,.
  • the induced currents induced in the X-axis loop coils X1, X2... XN are detected in the respective detection output periods TY12, TY22... TYM2, as described above with reference to FIGS.
  • the position detection output switches 33X1, 33X2,... 33XN are turned on, they resonate together with the output-side resonance capacitor 31.
  • the resonance voltage obtained at both ends of the output-side resonance capacitor 31 is output differential.
  • the position detection output signal S6 is sequentially transmitted through the amplifier circuit 32 and further through the synchronous detection circuit 37.
  • the user designates, for example, the coordinate position (of the XY coordinates of the X-axis loop coil plate unit 11 and the Y-axis loop coil plate unit 12 of the tablet display board unit 3 with the position designator 5 ( Xn, Y2)
  • the specified position detection control section 6 turns on the drive input switch 21Y2 by the sequential switching signal S2Y2 of the drive signal input section 13.
  • the resonance input current is generated by the Y-axis loop coil Y2 and the input-side resonance capacitor 25 in the drive input period TY21 which is the first half of the position detection operation period TY2 in FIG. Is passed through the Y-axis loop coil Y2.
  • the tuning coil 41 is electromagnetically coupled to the magnetic field generated by the drive resonance current flowing in the Y-axis loop coil Y2.
  • drive input energy is given to the position specifying tool 5.
  • the position detection signal output unit 14 sequentially switches the switching signals S5X1, S5X2,. ... S5XN sequentially turns on the position detection output switches 33X1, 33X2,... 33Xn,.
  • the tuning coil 41 of the position specifying tool 5 generates a tuning resonance current in the X-axis loop coil Xn specified by the user, whereas the other X-axis loop coils X1, X2,... Xn-1, Since Xn + 1,... XN are positioned at positions that are not close to the position specifying tool 5, the X-axis loop coils other than the X-axis loop coil Xn are not in a state of generating a tuned resonance current.
  • the induced current induced in the X-axis loop coil Xn maintains a state in which the induced resonance current is caused to flow by the output-side resonance capacitor 31. .
  • a large induced resonance voltage is formed at both ends of the output-side resonance capacitor 31 of the position detection signal output unit 14 by a resonance operation, and this is passed through the output differential amplifier circuit 32 and further through the synchronous detection circuit 37. And output as a position detection output signal S6.
  • the drive input switches 21Y1, 21Y2... 21YM are turned on for the Y-axis loop coils Y1, Y3... YM other than the coordinates (Xn, Y2) where the position specifying tool 5 is specified, and the input side resonance capacitor 25 Since the position specifying tool 5 is not positioned at a position close to the Y-axis loop coils Y1, Y3,... YM even if the resonance current flows from the tuning coil 41, the tuning coil 41 of the position specifying tool 5 performs the tuning operation. Therefore, it is not possible to obtain a state in which a tuning resonance current having a sufficient value flows through the tuning coil 41 and the tuning capacitor 42.
  • the position detection output signal S6 (Xn, Y2) is output at the timing when the X-axis loop coil Xn is turned on during the detection output period TY22.
  • the detection outputs obtained from the X-axis loop coils X1, X2... XN obtained in the output differential amplifier circuit 32 are X-axis loop coils X1, X2... XN and Y-axis loop coils Y1, Y2. Since a plurality of detection outputs are obtained from a plurality of X-axis loop coils in the vicinity of the specified position depending on how the specified position within the horizontal width of YM is deviated from the center position, the detection is performed by the coordinate position interpolation means provided in the central processing unit 2 A specified position detection signal corresponding to the specified position is obtained by performing an interpolation calculation from the output.
  • the tuning coil 41 and the tuning capacitor 42 of the position designation tool 5 at the designated position are used.
  • a tuning resonance current is induced in the X-axis loop coil Xn connected to the position detection signal output unit 14 from the position designating tool 5, and thereby the position designating tool 5.
  • the detection output representing the coordinate position (Xn, Y2) designated by can be obtained.
  • the input side Y-axis loop coils Y1, Y2,... Yn,. , And the output X-axis loop coils X1, X2,... XN are inductively resonant with the output-side resonance capacitor 31 by the tuning resonance operation of the position specifying tool 5.
  • a detection output having a large value corresponding to the coordinate position (Xn, Y2) positioned can be obtained with certainty.
  • the position detection output signal S6 representing the coordinate position (Xn, Y2) designated by the position designation tool 5 with high accuracy can be obtained with a relatively simple configuration as a whole.
  • Loop coil detection output signal X-axis loop coils X1, X2... XN and Y-axis loop coils Y1, Y2.
  • a detection output signal as shown in FIG. 5 is obtained from each loop coil, which is arranged overlapping in the X direction and the Y direction (referred to as overlap).
  • FIG. 4A As shown by paying attention to the four X-axis loop coils J1, J2, J3, and J4 in the inner region of the X-axis loop coil plate portion 11, three loop coils J2 are used. , J3 and J4 show the state in which the interpolation calculation is executed, and FIG. 4B shows the four regions of interest for the inner region of the X-axis loop coil plate 11 and the edge region surrounding it. A state in which interpolation calculation is executed by the outer two loop coils J3 and J4 among the loop coils J1 to J4 is shown.
  • Each of the loop coils J1 to J4 has a coil width L1 to L4, and coil pitches K1, K2, and K3 representing distances between the loop coils J1 and J2, between J2 and J3, and between J3 and J4 at the center position. Is formed.
  • detection output signals V1, V2, V3, and V4 are obtained from the loop coils J1, J2, J3, and J4 according to the movement of the assumed coordinate position on the horizontal axis.
  • the output levels of the detection output signals V1, V2, V3, and V4 exhibit a mountain-shaped waveform that approximates a quadratic function expression having a vertex at an assumed coordinate position indicating the center position of the coil widths L1, L2, L3, and L4. Change like this.
  • the loop coil having the coordinate range L0 (shown with respect to, for example, the loop coil J3 in FIG. 5) having the largest output level among the adjacent waveforms is the loop coil that has been designated by the position designation tool 5, and the coordinate range L0.
  • the position specified by the position specifying tool 5 is actually included.
  • the output level of the detection output signal V3 of the center loop coil J3 is in a coordinate range greater than the detection output signals V2 and V4 of the adjacent loop coils J2 and J4.
  • the coordinate position of the vertex coordinate point P that can actually be detected in the coordinate range is experimentally the center coordinate position of the loop coil J3 or the coordinate position deviated from the coordinate position. I know.
  • an interpolation calculation expression that can specify the amount of coordinate deviation is expressed as follows: in the case of interpolation calculation for the inner region, one loop coil J3 and two loop coils J2 and J4 adjacent to both sides thereof. ( Figure 4 (A) and Figure 5 (A)), in the case of edge region interpolation calculation, adjacent two loop coils J3 and J4 ( Figure 4 (B) and Figure 5 (B)) Find from the relationship.
  • the designated position coordinate X designated by the position designation tool 5 is calculated based on the three loop coils J3 and J2 and J4.
  • V3 is a detection output value of the center loop coil J3 among the three loop coils J2 to J4
  • V2 is a detection output value of the loop coil J2 adjacent to the inside of the center loop coil J3
  • V4 is A detected output value of the loop coil J4 adjacent to the outside of the center loop coil J3
  • K01 is a coil pitch between the center loop coil J3 and the loop coils J2 and J4.
  • the first term of the expression (1) represents a coordinate shift amount from the center coordinate of the loop coil J3 serving as the center to the specified position coordinate of the position specifying tool 5.
  • the second term of the expression (1) represents the coordinates on the X-axis loop coil plate portion 11 of the loop coil J3 as the center.
  • the coordinate calculation by formula (1) is performed by the three loop coils J3 and J2 in the central processing unit 2 as the designated position detection waveform W0 shown in FIG. And the coordinates (p, q) of the vertex P based on the detection outputs V3 and V2 and V4 obtained from J4, changes in the coordinate positions of the detection outputs V3 and V2 and V4 (FIG. 5A) near the vertex.
  • the coordinate p of the apex P of the designated position detection waveform W0 is calculated using a quadratic function formula as an approximate conversion function.
  • the position detection signal S6 obtained from the position detection signal output unit 14 is obtained from the three loop coils J3 and J2 and J4 exhibiting changes that approximate a quadratic function as described above with reference to FIG.
  • the designated position detection waveform W0 is expressed by the following equation.
  • the conversion result y can be obtained by a quadratic equation for the change of the variable x in the xy coordinate system.
  • the axis of the translated curve is
  • the straight line x represented by the equation (7) contains three pieces of information necessary for specifying the coordinate position in the X-axis direction designated by the position designation tool 5 on the X-axis loop coil plate part 11. Therefore, it is necessary to express the unknowns a and b in the equation (7) with the two loop coils J2 and J4 on both sides. Find it from the conditions.
  • the right-side loop coil J4 having a large X coordinate value on the X-axis loop coil plate portion 11 has a positive direction with respect to the loop coil J3 at the center. Since it can be considered that it has moved in parallel,
  • the left-hand loop coil J2 having a small X-coordinate value can be considered to have been translated in the negative direction with reference to the center loop coil J3.
  • the detection signal values V2 and V4 obtained from the loop coils J2 and J4 on both sides can be obtained.
  • the coordinates x3 and x2 and x4 of the center position of the coil width of the three loop coils J3 and J2 and J4 are fixed values while x is variable.
  • variable x corresponds to the coordinate values for the loop coils J3 and J2 and J4, which are simultaneously the coil pitches K1, K2 and K3 between the central loop coil J3 and the loop coils J2 and J4 on both sides. This represents the distance K01 in FIG.
  • the unknown number a is obtained as follows.
  • the X coordinate at the apex of the XY coordinate system representing the designated position detection waveform W0 is
  • This equation (25) is expressed by the three loop coils J3 and the detection outputs V3 of J2 and J4 and V2 and V4 as shown in the first term of the above equation (1). It represents an interpolation calculation value that represents a coordinate shift from the center coordinate of the width.
  • the vertex coordinates in the X direction of the designated position detection waveform W0 are designated by the position designation tool 5 using the three loop coils J3 and the detection outputs V3 and V2 and V4 of J2 and J4.
  • the position designation tool 5 can be obtained as a position.
  • the tablet display board portion 3 of the position designation detection unit 4 is reliably interpolated and detected. be able to.
  • the detection output V4 obtained from the outermost loop coil J3 in the inner region is obtained from the detection output signals V1, V2, and V3 of the loop coils J1, J2, and J3 in the inner region, as shown in FIG. Since it has a similar level distribution, two of the coordinate positions designated by the position designation tool 5 using the two loop coils of the loop coil J4 in the edge region and the loop coil J3 adjacent to the inside of the two are provided. Interpolation calculation of the specified position of the edge region is performed by the detection outputs V4 and V3 obtained from the loop coils J4 and J3.
  • the detection output signal V4 is obtained from the loop coil J4 in the edge region, and the detection output signal V3 obtained from the loop coils J3 and J2 in the inner region disposed inside thereof.
  • the vertex coordinate value (p, q) of the designated position detection waveform W0 assumed by V2 is obtained by interpolation calculation.
  • the signal level of the detection output signal V4 is the detection output of the loop coil J3 in the inner region adjacent to the inside. Since the signal becomes larger than the signal V3, an interpolation result with high interpolation accuracy can be obtained by performing an interpolation operation using the detection signal V4 of the large loop coil J4.
  • the accuracy of detection of the designated position by the position designation tool 5 is increased by performing the interpolation calculation.
  • the first term represents a coordinate shift value from the reference loop coil J4 to the apex coordinate value p in the edge region where an effective detection output is obtained, and X of the loop coil J4 of the second term.
  • the coordinate value on the axis loop coil plate part 11 is represented.
  • Equation (27) is configured based on the actually measured values of the actually measured signal waveforms V1 to V4 indicated by the signal waveforms V1 to V4 of FIG.
  • FIG. 2 shows the detection output value of the position detection output signal S6 obtained from the position detection signal output unit 14 (FIG. 2) when sequentially positioned, and between the loop coils J1 and J2 in the inner region, and J2 and
  • the coil pitch K12 between J3 and the value of K23 are selected to be equal to K01, and the coil pitch K34 between the outermost loop coil J3 in the inner region and the loop coil J4 in the edge region is set to the coil in the inner region.
  • a value smaller than the pitch K01 (for example, about 1/3) is selected as K11.
  • This measured signal waveform becomes maximum at the center position of the coil width, and the mountain-shaped waveforms are successively connected within the range intersecting with the detection output of the adjacent loop coil.
  • the position specifying tool 5 has specified the coordinates of the center position of the coil width of each of the loop coils J1, J2, J3, and J4. It can be seen that the distance to the position is the coil pitch.
  • the vertex coordinate values (p, q) are larger than the detection output V4 of the loop coil J3 disposed in the inner region inside the loop coil J4 disposed in the edge region. Therefore, the detection output of the loop coil J4 disposed in the edge region is within the effective range, and the highly effective vertex coordinate value can be interpolated, and thus the designation of the X-axis loop coil plate portion 11 is possible. This means that the position detection range can be expanded from the inner region to the edge region surrounding it.
  • the configuration of the interpolation calculation formula based on the actually measured value of the equation (27) is the same as the interpolation equation by the approximate conversion in the three loop coils in the inner region described above with respect to the equation (1).
  • the equation is such that the detection output of the loop coil including the reference loop coil and the specified position detection waveform W0 approximate to a quadratic function, so that the unknown of the quadratic function is based on the installation conditions of the loop coil of the X-axis loop coil plate part 11. Since it is an approximate arithmetic expression to be converted, it can be evaluated that the accuracy of the conversion result of the vertex coordinates is high.
  • the conversion formula of the equation (27) is the same as the approximation formula of the quadratic function, but the equation (27) is obtained in advance as an actual measurement value in the X-axis loop coil plate portion 11. Further, it is defined based on the detection output signal of FIG. 5B, and it can be said that the accuracy of the conversion result is high so as to match the actual measurement value.
  • the specified position by the position specifying tool 5 is calculated with the center coordinate value of the loop coil J4.
  • the detection output V4 is smaller or larger than V3
  • the designated position by the position designation tool 5 is calculated as a coordinate value inside or outside the loop coil J4.
  • the loop coil J4 in the edge region used in the equation (27) and the loop coil J3 in the inner region disposed inside the edge region are used.
  • the coordinate calculation value obtained by interpolation calculation is effective for coordinate calculation. Since the result changes linearly in the range VLX, the following expression
  • both curves corresponding to the effective range Q of coordinate calculation are lowered in a substantially linear relationship, and between the measured coordinate values 16 and 17 (this is the point where the detection outputs V4 and V3 intersect, that is, It decreases linearly at different slopes to a position corresponding to the lower limit of the coordinate calculation effective range VLX.
  • the effect of correcting the coil pitches K11A and K11B is that the loop coil J4 disposed in the edge region and the loop coil J3 disposed on the inner side thereof.
  • the detection output V4 of the inner loop coil J3 is from the measured coordinate position P1 where the detection outputs V4 and V3 of the two intersect.
  • K11) K11
  • the limit value of the coil pitch is determined by simulation or actual measurement.
  • the ineffective area between the outer edge of the loop coil and the display area can be narrowed together with the effect of expanding the outer peripheral edge of the tablet display board 3, that is, the display area of the tablet.
  • the loop coil is contained in the display area of the tablet.
  • in order to maintain the coordinate accuracy it is necessary to protrude the loop coil from the display area of the tablet, and a frame is required on the outer peripheral edge of the tablet display board 3. If this technology is used, it is possible to configure a tablet having a narrow frame or a feature without a frame.
  • FIG. 14 is used to show the reason why a tablet having features with no narrow frame and no frame can be configured.
  • FIG. 14A shows the case of the prior art
  • FIG. 14B shows the case of the embodiment of the present invention.
  • one outer end edge portion of the X-axis loop coil is shown, but the other outer end edge portion and the Y-axis loop coil are the same.
  • the center portions of the loop coils at which the respective detection signals of the X-axis loop coils J11 to J13 peak are indicated by P11 to P13.
  • the detection signal of each loop coil is indicated by V11 to V13 in the detection output signal diagram in the middle stage.
  • the effective area VAL1 is a limit for coordinate calculation.
  • the center portions of the loop coils at which the respective detection signals of the X-axis loop coils J21 to J24 reach the peak are indicated by P21 to P24.
  • the detection signal of each loop coil is indicated by V21 to V24 in the detection output signal diagram in the middle stage.
  • the effective area VAL2 is the limit for coordinate calculation.
  • the invalid area UN2 exists outside the effective area VAL2 and between the outside G2 of the coil.
  • the tablet display board unit 3 cannot be used as the display area 15, and the loop coil needs to be accommodated in the apparatus, so that the frame 16 is formed.
  • the invalid area UN2 is narrower.
  • the coil pitch and the effective level VL2 are set low, the frame 16 can be eliminated and the loop coil can be accommodated in the display area. Therefore, it is clear that a tablet having a narrow frame or a feature without a frame can be configured.
  • FIG. 12 shows an edge surrounding the inner area of the tablet display board 3 with respect to the effective area enlarged to the edge area by the two loop coils described above.
  • a modification example is shown in which the edge region can be used for a touch button specifying operation capable of inputting an operation input to be arranged in the information processing apparatus 1.
  • the effective area VAL2 enlarged so that the coordinate position can be specified by two loop coils outside the effective area VAL1 where the coordinates can be specified by three loop coils.
  • the touch button display DIS is designated with three touch button coordinate positions TB1, TB2, and TB3 by the position specifying tool 5 for the enlarged effective area VAL2. Then, the central processing unit 2 detects the coordinate position based on the coordinate detection position information, assuming that the touch button operation input is input to the information processing apparatus 1.
  • the designated position of the position designation tool 5 is detected by the interpolation calculation using the two loop coils for the display area which is conventionally considered to be a decorative part where the outer peripheral edge of the tablet display board 3 cannot be used.
  • the information processing apparatus 1 that can detect the touch button operation input to the information processing apparatus 1 can be realized by utilizing the fact that it can be performed.
  • FIG. 13 shows an embodiment in which a loop coil J5 for touch button detection is provided outside the edge region, and the touch button is a tablet.
  • positioning in the position away from the outer-periphery edge part of the display board part 3 is shown.
  • the designated coordinates for the touch button display DIS are detected by interpolation calculation using the outermost loop coil J4 of the two loop coils.
  • a loop coil J5 dedicated to touch button detection is provided outside the outermost loop coil J4, thereby further touching the button outside the effective area VAL2 expanded by the two loop coils J3 and J4.
  • a dedicated effective area VAL3 is formed.
  • the loop coil J5 dedicated to the touch button performs central processing on the detection output when the position designation tool 5 designates the touch button display DIS displayed in the edge region corresponding to the outer frame portion of the tablet display board 3. This is sent to the unit 2, thereby notifying the central processing unit 2 that the position designation tool 5 has designated the touch button display DIS.
  • detection of which of the three touch buttons DB1, DB2, and DB3 forming the touch button display DIS is specified by the position specifying tool 5 is performed by a signal of the loop coil J5 dedicated to touch button detection.
  • the detection is performed by a detection output signal obtained from the loop coil of the Y-axis loop coil plate portion 12 formed so as to overlap the X-axis loop coil plate portion 11. Then, it is assumed that the touch button is touched by performing a tap operation or a switch operation by operating the position specifying tool.
  • the effective area VAL2 expanded by the two loop coils is formed outside the effective area VAL1 formed by the three loop coils in the central area, and the loop coil dedicated to the touch button is further formed outside the effective area VAL2.
  • the effective area VAL3 it is possible to realize an information processing apparatus in which the position specifying tool 5 can be specified up to the position of the outer frame of the tablet display board unit 3.
  • connection relationship of the loop coils in the X-axis loop coil plate portion 11 and the Y-axis loop coil plate portion 12 is fixed, so that the coil width and coil pitch of the loop coil are set.
  • the coordinate interpolation accuracy is further improved. Can be.
  • the present invention can be used when obtaining position information of a designated position from the operation panel display surface.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

La présente invention a pour objet d'accroître la précision de la désignation de coordonnées visées. La présente invention est susceptible de réaliser un dispositif de détection de position désignée au moyen duquel il est possible de désigner avec exactitude une position de coordonnées visées non seulement sur une région intérieure d'une surface (3) de désignation de positions en coordonnées, mais également sur une région de bord périphérique de la surface (3) entourant la région intérieure, au moyen d'un équipement (5) de désignation de position. Ceci est accompli en détectant la différence entre une position en coordonnées d'une première bobine (J4) à spire sur la région de bord périphérique et une valeur de coordonnées de pic (p) d'une sortie (W0) de détection de coordonnées désignées sur la base de la sortie (V4) de détection de la première bobine (J4) à spire, de la sortie (V3) de détection d'une deuxième bobine (J3) à spire sur la région intérieure adjacente à la première bobine (J4) à spire, et du pas (K02) de bobine entre la première bobine (J4) à spire et la deuxième bobine (J3) à spire.
PCT/JP2014/000817 2014-02-18 2014-02-18 Dispositif de détection de position désignée WO2015125170A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CN201480003364.3A CN105051655A (zh) 2014-02-18 2014-02-18 指定位置检测装置
KR1020147030781A KR101498870B1 (ko) 2014-02-18 2014-02-18 지정 위치 검출 장치
JP2014543647A JP5661980B1 (ja) 2014-02-18 2014-02-18 指定位置検出装置
US14/432,718 US20160349915A1 (en) 2014-02-18 2014-02-18 Specified Position Detection Device
PCT/JP2014/000817 WO2015125170A1 (fr) 2014-02-18 2014-02-18 Dispositif de détection de position désignée
TW104105679A TW201601028A (zh) 2014-02-18 2015-02-17 指定位置檢測裝置

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PCT/JP2014/000817 WO2015125170A1 (fr) 2014-02-18 2014-02-18 Dispositif de détection de position désignée

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WO2018051955A1 (fr) * 2016-09-15 2018-03-22 シャープ株式会社 Dispositif d'affichage à panneau tactile intégré
WO2018066685A1 (fr) * 2016-10-06 2018-04-12 シャープ株式会社 Panneau tactile et système de panneau tactile
JP6900231B2 (ja) * 2017-04-24 2021-07-07 株式会社ジャパンディスプレイ タッチ検出装置及び方法
JP6937191B2 (ja) * 2017-08-22 2021-09-22 株式会社ワコム 位置検出センサおよび位置検出装置
CN110192170B (zh) * 2017-12-11 2022-10-14 深圳市汇顶科技股份有限公司 触摸控制器、装置、终端及触控方法
JP7073230B2 (ja) * 2018-08-24 2022-05-23 株式会社ジャパンディスプレイ 表示装置

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JPH08202491A (ja) * 1995-01-23 1996-08-09 Graphtec Corp デジタイザ
JP2001043006A (ja) * 1999-07-29 2001-02-16 Brother Ind Ltd 座標読取装置
JP2001209485A (ja) * 1999-11-15 2001-08-03 Brother Ind Ltd 座標読取装置

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Publication number Priority date Publication date Assignee Title
JP5358834B2 (ja) * 2009-02-17 2013-12-04 株式会社ワコム 位置指示器及び入力装置
JP5270482B2 (ja) * 2009-07-13 2013-08-21 株式会社ワコム 位置検出装置及びセンサユニット

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH08202491A (ja) * 1995-01-23 1996-08-09 Graphtec Corp デジタイザ
JP2001043006A (ja) * 1999-07-29 2001-02-16 Brother Ind Ltd 座標読取装置
JP2001209485A (ja) * 1999-11-15 2001-08-03 Brother Ind Ltd 座標読取装置

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CN105051655A (zh) 2015-11-11
KR101498870B1 (ko) 2015-03-04
JPWO2015125170A1 (ja) 2017-03-30
JP5661980B1 (ja) 2015-01-28
TW201601028A (zh) 2016-01-01
US20160349915A1 (en) 2016-12-01

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